Means for operating drills.



PAPENTPP PEB. s, 1906.

O. S. PROCTOR. MEANS FOR OPERATING DRILLS.

APPLICATION FILED 21.29.1905.

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SWW/whom PATENTBD PBBQG, 1906. 0. s. PROGTOR.

MEANS POR OPERATING DRILLS. APPLICATION FILED APR.29,1905.

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01.1151l s. PRocToR, on DENVER., coLonAno.

MEANS FOR OPERATING DRILLS.

Specification of Letters Patent.

Patented Feb. 6, 1906.

Application led April 29, 1905. Serial No. 258,101.

. To @Z w/oom it may concern.-

Be it known that I, OLIN S. PRocToR, a citizen of the United States, residing in the city and county of Denver and State of Colorado, have invented certain new and useful Improvements in Means for Operating Drills; and I doy declare the following to be avfull, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanylng drawings, and to the iigures of reference marked thereon, which form a part of this specification.

My invention relates to means for operating drills or other reciprocating devices employed in mining or similar work where it becomes necessary to form holes in rock for blasting or other purposes.

In my improved apparatus I employ an electric motor with whose armature is. connected a crank disk or wheel, with which is connected a piston located in a cylinder mounted on the frame 'of the motor, the portion of the cylinder in front ofthe piston being connected, by means of a suitable conduit, with the drill-cylinder, in which is located a i piston which may operate either -as-a hammer upon the drilling-tool, or it may be a piston with which the drilling-tool is connected, as may be desired. As the fmotor piston moves in one direction the operating-iuid-as air-is compressed in the drill-cylinderbehind the drilling'- piston, whereby the latter is driven forwardly. As the motor piston /nakes the reverse movement the air is rareed sufficiently in the drill-cylinder to cause "f the .iston of the latter to make the backwar movement. In this way the reciproeating movement is imparted to the drillpiston in a thoroughly practicable and economlcal manner.

The drill-cylinder is provldedyvitlra by-pass leading from the pistonchamber in the rearbf the piston to a point 1n tliejear ofthe drilling-tool, whereby fluid vmay be supplied'.l to` the drill-hole through a longitudinal passage in the drilling-tool for the purpose ofjIIlOVing the rock cuttings. Suitable valv'mechanism is connected with `nfehanism is also of such structure that instead of forcing the air or other operating iluid directly from the motor cylinder through the conduit into the drill-cylinder the valve may be adjusted to cause the fluid to pass from the motor-cylinder through a bypass and thence into the drill-cylinder. In this case the return of the air through the bypass is prevented by a check-valve, which while it allows the air to pass freely from the motor-cylinder to the drill-cylinder prevents its return. In this event the drill-piston is moved forwardly, but no rearward movement is imparted thereto, and hence it remains in the forward position, and all of the air forced into the drill-cylinder is delivered through the by-pass in the drill-cylinder and through the longitudinal passage in the drilltool tothe drill-hole for the purpose of thoroughly cleaning out the latter. When the valve'is' arranged as just explained,a new supply of air is drawn into the motor-cylinder from the atmosphere through a checkvalve which opens during the rearward movement of the motor-piston.

Having briefly outlined Inj` improved construction, as well as the function it is intended to perform, I will proceed to describe the same in detail, reference being made to the accompanying drawings, in which is illustrated an embodiment thereof.

In the drawings, Figure l is a side elevation of my improved apparatus, the parts being connected in operative relation. Fig. 2 is a longitudinal section of the drill mechanism shown on a larger scale than in Fig. 1. Fig. 3 is a similar View of the motor and motor-cylinder. This view, however, is only partly in section. Fig. 4 is a section taken on the line 4 4, Fig. 2. Figs. 5 and 6 are sectional views of the valve mechanism connected with the motor-cylinder, the parts being shown on a larger scale than in the other views.

The same reference characters indicate the same parts in all the views.

Let the numeral 5 designate a motorniounted on a base 6, provided with clamping-legs '7, adapted to be secured to a supporting plank or board 8 by means of a screw 9, provided with right and left threads passing through threaded openings formed in the legs 7. The screw 9 is provided. with an adjusting device 10 for purposes of manipulation.

12 and 13 are the coi'lductors, leading from the motor to any suitable source of electrical supply. The motor-arnntture is journaled in plates 14 and 15, located. at opposite ends of the motor. The plate 15, as shown in the IOO IIO

drawings, is formed integral with the cylinder 16, Whose rear portion'is provided with a housing 1 7, inclosing a crank-wheel 18,1nounted on the armature-shaft 1 9. Connected with a wrist-pin of the wheel 18 is apitman 20, whose opposite extremity is connected with a'piston 21, located in the motor-cylinder 16. The cylinder-chamber in the rear of the piston communicates with the amtosphere throughone or more-openings 22, formed in the plates 14 and 15 at the opposite ends of the motor, thus permitting atmospheric air to enter freely and exhaust from the motorcylinder in the rear of the piston during the operation of the apparatus.

The motor-cy ni le 24, connected with a casing 25, in W ch is located a valve 26. This nipple 24 communicates with the valve-chamber, which is also provided with branches 27 and 28., lo-

cated on opposite sides of the valve 26. In the passage 28 is located a check-valve 29, adapted to open inwardly in response to suction. Within the branch-pipe 27 is located a check-valve 30, adapted to open outwardly under ressure. This part 27 is connected with a ranch 31, leading from the valve-casing and with which is connected a conduit 32, which leads to an upright tubular part 33, formed integral with the head 34 of the drillcasi-ng cylinder 40. Within .this tubular device 33, which is provided with an outlet-orifice 35, is located a tubular valve 36, provided with an orifice 37, adapted to re ister with the orifice 35 when it is desired t at the air deliveredA to the device 36 shall-pass to the atmosphere, as when it is desired to stop the reci rocating movement of the drill-piston, Wit out stoppin the motor. At other times or when the dri l- Aiston is in operation the valve 36 is adj uste by means of a hand-wheel 38, connected with its upper extremity to throw the port 37 out of register with the -port 35, in which event the fluid from the motor-cylinder after leaving the iiexible conduit 32 will enter the part 33 and pass through the hollow valve into the passage 39 and thence into the cylinder 40 in the rear of the piston 41 and drive the latter forwardly, causing it to strike the rear extremity of the drillingtool 42, which is slidably fitted in the chuck 43, inserted in the forward extremity of the casing connected with the drill-cylinder. In

der is provided with a, threaded opening 23,`into which is screwed a ton will become sufficiently rareiied to cause the drill-piston to make the reverse movement. In this way a reciprocating movement may be constantly imparted to the piston, which, as shown in the drawings, constitutes a hammer whose forward extremity engages the rear end of the drilling-tool.

Leading from the rear ortion of the drillcylinder is a by-pass 44, eading to an opening ,45, located in the rear of the drilling-tool 42, the latter being provided with a longitudinal passage 45. In this passage 44 is located a small spring-actuated check-valve 46, which allows the air to pass freely through the passage in one direction, but prevents its return.

Iblow if it is desired to deliver all of the operating fluid to the drill-hole while the drillpiston remains stationary the valve 26 is adjusted to occupy the position shown in Fig.v

movement it will be understood that the suction incident to the reverse movement of the motor-piston does not act on the drill-cylinder. Consequently the drill-piston will remain at its forward limit of movement. The suc- IOO tion of the motor-piston will draw ail'i from its reciprocation the air will be alternately i drawn from the atmosphere and forced into K the drill-cylinder in the rear of the latters piston, and thence throughv the 'by-pass 44 and the longitudinal opening of the drillingtool into the drillhole, whereby the latter may be thoroughly cleaned out while the drill-piston remains stationary. 1

Attention is called to the fact that a weak coil-spring 49 is located inthe chamber of the drill-cylinder in the rear of the piston and acts as a buffer to prevent the said piston from striking too hard against the head of the cylinder during the rearward movement of the piston. The drill-cylinder chamber in front of the piston exhausts to the atmosphere through ports 50.

The passage 44 is formed partly in a tapering valve-plug 51, loosely mounted in an opening 52, formed in the wall of the drillcylinder. may be made to register with a port 53, formed in the wall of the cylinder. The plug 51 is provided with an exposed handle 54, passing through a nut 55, threaded -into The passage in this valve-plug the Wall of the drillcylinder, whereby the valve plug may be tightened in its tapered bore in case it becomes too loose. When it is desired to shut 0H the escape of fluid from the piston-chamber of the drill into and through the passage 44 to the drill-hole, the valveplug 51 is turned so that the opening 44a therein shall not register with the port 53. From this explanation it will be readily understood that the fluid may be made to pass from the drill-cylinder into the drill-hole simultaneously with the operation of the drillpiston or separately therefrom, as may be desired.

Having thus described my invention, what I claim isq 1. A rock-drill of the class described, ineluding a cylinder, a piston, and means for introducing motive fluid to the cylinder, of a by-pass leading from the drill-cylinder to a point forward of the piston for delivering fluid to the drill-hole, and a check-valve located in said by-pass and adapted to allow uid to pass therethrough to'the drill-hole but arranged to prevent the return of the rock cuttings into the cylinder.

2. The combination of a motor cylinder and piston, adrill-cylinder and piston, a oonduit connecting the two cylinders, a by-pass leading from the drill-cylinder to a point forward of the piston for deliverin fluid to the drill-hole, and means for contro ling the passage of air from the motor-cylinder whereby the air is forced into the drill-cylinder during the forward movement' of the motor-piston,

but rarefaction of the lair in the drill-cylinder prevented during the backward movement of the motor-piston, whereby the only outlet for the air from the drill-cylinder is by way of the said by-pass, substantially as described.

3. The combination of a motor-cylinder, a piston therein, a drill-c lidr pistongonstiuting a ammer, a r1 ingoo ldcated forwardTf-tlnltnfmer and having a longitudinal passage therethrough for delivering llud to the drill-hole, a conduit between the two oylindersavhypass lea `nv from the drillcylincler/tnapnint in front oiltlndrilhng-*tbh avflve for controlling tHe-saidby-pass, valve mechanism for controlling the passage of air between the two cylinders, said mechanismbeing constructed to allow the air to pass freely from the motor cylinder to the drill-cylinder during the forward movement of the motorpiston while the rarefaction of the air in the drill-cylinder is prevented during the return movement of the motor-piston, the motorcylinder being supplied with air from the atmosphere during the reverse movement of its piston, and adjustable means connected with the drill-cylinder whereby the air may be allowed to escape from the conduit into the atmosphere, or compelled to pass to the drillcylinder as desired.

ln testimony whereof I ailix my signature in presence of two witnesses.

OLIN S. PROCTOR. Witnesses:

DENA NELSON, A, J. OBRIEN. 

